01152338

Component

Road roughness is considered to be one of the most important indicators of the performance of the pavements and is also a major determinant of road user costs. Most longitudinal road profile measurements are summarized using the International Roughness Index (IRI) which was developed by the National Cooperative Highway Research Program (NCHRP) and the World Bank. A laser-based inertial profiler is this most common instrument used to measure longitudinal profiles at highway speeds. These profiles are then used to compute the IRI at project and network levels. The primary objective of this paper is to present the process followed to develop a certification site for verification of inertial profilers on the Virginia Smart Road. This exercise also served to increase the understanding of how varying sampling rates, processing methods, and other factors contribute to the different results obtained by different inertial profilers. Based on the general requirements set forth by the specifications, five test sections were chosen. Profiles from eight different inertial profilers were then compared to reference measurements made with an ICC SURPRO device. Good agreement was found between the reference device and each of the participant profilers IRI for all the test sections. Errors in the distance as recorded by the profilers’ distance measurement equipment resulted in low cross-correlations for reproducibility with the reference profiler.

01147878

10-2513

English

13p

2010

Transportation Research Board 89th Annual Meeting

DVD

Figures; Photos; References (12) ; Tables (7)

Automated highways; Pavement maintenance; Pavement management systems; Pavement performance; Roughness

International Roughness Index; Virginia Smart Road

Pavement profilers

Highways; Maintenance and Preservation; Pavements; I61: Equipment and Maintenance Methods

Transportation Research Board Annual Meeting 2010 Paper #10-2513

TRIS, TRB

Jan 25 2010 11:11AM